CN117361338A - Method for mounting upper structure of quay bridge by means of overrunning gantry crane - Google Patents

Abstract

The invention relates to the technical field of crane installation of a quay crane, and discloses a method for installing a quay crane superstructure by a gantry crane in an overrun way, which comprises the steps that two hoisting joists are hoisted between a rear girder below an upper cross beam and a flange opening of the upper cross beam by the gantry crane in a matching manner, so that a hoisting point moves outwards, the hoisting point is staggered with a rear pull rod, and the hoisting joists are fixedly connected with the upper cross beam; the gantry crane is connected with a hoisting joist through three groups of lifting hooks formed by two lifting hooks of the upper trolley and one lifting hook of the lower trolley in cooperation with a hoisting steel wire rope, and the upper structure of the hoisting shore bridge is welded to the landing position of the door frame; then removing the hoisting joist; the lifting point moves outwards and downwards by means of the lifting joist, and the lifting joist is used for bearing horizontal component force generated by lifting, so that the interference problem of the lifting hook and the rear pull rod is solved, the balance steel wire rope is prevented from interfering with the main beam of the gantry crane in the lifting process, and the safety of the structure is ensured.

Description

Method for mounting upper structure of quay bridge by means of overrunning gantry crane

Technical Field

The invention relates to the technical field of crane installation of a quay crane, in particular to a method for installing an upper structure of the quay crane by exceeding the limit of a gantry crane.

Background

The lifting points are arranged between the upper cross beam and the rear girder or on the upper cross beam, and the horizontal component force generated by the lifting is mainly born by the rear girder, but for the shore bridge with ultrahigh lifting height, the lifting of the component of the upper structure by using the gantry crane according to the conventional process can cause interference between the lifting hook and the rear pull rod. The suspension point then needs to be moved outwards to avoid interference of the hook with the rear drawbar. But simply move the hoisting point outside on the bridge superstructure, because there is not the vaulting pole between the sea land side entablature, because wire rope exists the contained angle in the hoist and mount in-process, the horizontal force that hoist and mount produced probably can lead to bridge superstructure to appear warping. Meanwhile, on the premise of not changing the length of the hoisting steel wire rope, only the hoisting point is shifted to the outer side of the hoisting point of the original upper structure, when the trolley lifting hook on the gantry crane is lifted to the maximum height, the balanced steel wire rope between the two lifting hooks of the upper trolley is easy to interfere with the main beam of the gantry crane, and risks exist in the hoisting process.

Based on the above problems, when the gantry crane faces the upper structure of the quay crane exceeding the lifting capacity of the gantry crane, the assembly operation of the quay crane is usually carried out by lifting parts or using a large-tonnage crawler crane, but the lifting parts increase the occupation period of the production field, and the lifting cost of using the large-tonnage crawler crane is too high.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention aims to provide a method for installing the upper structure of the quay bridge by the portal crane in an overrun way, by means of the lifting joist to realize outward movement and downward movement of a lifting point and by means of the lifting joist to bear horizontal component force generated by lifting, the problem of interference between a lifting hook and a rear pull rod is solved, and the balance steel wire rope is ensured not to interfere with a main girder of the portal crane in the lifting process, so that the safety of the structure is ensured.

In order to achieve the above object, the present invention is realized by the following technical scheme:

a method for installing a quay crane superstructure by portal crane overrun comprises the following steps:

the gantry crane is matched with the hanging strip to hoist the two hoisting joists between the rear girder below the upper cross beam and the flange opening of the upper cross beam, so that the outward movement of the hoisting points is realized, the hoisting points are staggered with the rear pull rod, and the hoisting joists are fixedly connected with the upper cross beam;

the gantry crane is connected with a hoisting joist through three groups of lifting hooks consisting of two lifting hooks of the upper trolley and one lifting hook of the lower trolley in a matched hoisting steel wire rope, and the upper structure of the hoisting shore bridge is welded to the landing position of the door frame;

the three groups of lifting hooks are placed down and the hoisting steel wire ropes are removed, the lower trolley is connected with the hoisting joists through the hanging strips, the connection between the hoisting joists and the upper cross beam is firstly removed, and then the hoisting joists are placed down to the flat trolley to be transported away, so that the removal of the two hoisting joists is sequentially completed.

As a further implementation mode, the lifting joist is symmetrically provided with two middle lifting points close to the middle, lifting points and fixed lifting points are arranged at the two ends, a lifting hook of a lower trolley of the gantry crane is connected with the middle lifting points through a hanging belt to install the lifting joist, the two ends of the lifting joist are abutted with the bottoms of the sea side upper cross beam and the land side upper cross beam, the fixed lifting points and the upper cross beam are connected by using shackles and fixed steel wire ropes, then the lower trolley is unhooked, and the hanging belt is paved on the lifting joist.

As a further implementation mode, the lower trolley lifting hook is connected with the lifting joist through a hanging strip, and the lifting joist is obliquely inserted below the sea side upper cross beam and the land side upper cross beam and then is vertically lifted.

As a further implementation mode, two ends of the lifting joist are respectively abutted with the sea side upper cross beam and the land side upper cross beam, anti-slip rubber is arranged on the lifting joist to prevent slipping, and rib plates closely attached to the upper cross beam are arranged on two sides of the matching position of the lifting joist and the upper cross beam to position.

When the upper structure of the shore bridge is lifted, two rope heads of the hoisting steel wire ropes are utilized to be matched with shackles to be connected with hoisting hanging points, the middle part of the hoisting steel wire ropes is matched with three groups of lifting hooks, wherein the lower trolley is connected with two ends of one hoisting joist through two hoisting steel wire ropes, the upper trolley is connected with two ends of the other hoisting joist through two steel wire ropes, and the two lifting hooks of the upper trolley are connected through balance steel wire ropes.

As a further implementation mode, when the hoisting joist is installed, the support is utilized to lift the upper structure of the shore bridge, an unmanned plane is utilized to observe whether a height difference exists between a supporting point between the hoisting joist and the upper cross beam when the upper structure of the shore bridge is lifted, if so, the angle of the front girder is adjusted through the pitching mechanism of the shore bridge to eliminate, and whether a rear pull rod and a balance steel wire rope interfere with the main girder of the gantry crane is observed in the hoisting process.

As a further implementation mode, three groups of lifting hooks are lowered to the lifting joist, the lifting steel wire ropes are untied, two rope heads of the lifting steel wire ropes are connected with the three groups of lifting hooks through hanging strips, the three groups of lifting hooks are lifted, the rope heads of the sea side lifting steel wire ropes smoothly cross the diagonal bracing at the top of the rear girder, the upper trolley and the lower trolley are moved to the outer side of the door frame, the lifting hooks are lowered to the ground, and unhooking is achieved.

As a further implementation mode, the lower trolley of the gantry crane is lifted to the upper part of the lifting joist, the lower trolley lifting hook is connected with the middle lifting point of one lifting joist through a reserved hanging strip, the lower trolley lifting hook is provided with force to enable the connecting shackle between the lifting joist and the upper cross beam to be in a loose state, and the fixed connection between the fixed lifting point and the upper cross beam is released.

As a further implementation, the lower trolley lifting hook lowers the lifting joist to the position below the shore bridge connecting beam through the hanging belt, and when the lifting joist is rotated by 90 degrees by using the guide rope at the position above the lower cross beam, then the lifting joist is lowered to the flat car to be carried away.

As a further implementation, the lower trolley removes the second lifting joist in the same manner.

The beneficial effects of the invention are as follows:

1. according to the invention, the two hoisting joists are hoisted between the rear girder below the upper cross beam and the flange opening of the upper cross beam by using the gantry crane to cooperate with the hanging strip, so that the hoisting points are staggered with the rear pull rod, the horizontal component force generated by hoisting is born by the hoisting joists, the interference problem of the hanging hook and the rear pull rod is solved, and meanwhile, the upper structure of the shore bridge is ensured not to deform in the hoisting process.

2. According to the invention, the lifting joist is arranged below the upper cross beam, so that the lifting point moves downwards, the lifting hook of the trolley is lowered without interference on the premise that the steel wire rope is not replaced and the lifting hook is staggered with the rear pull rod, and the distance between the balance steel wire rope connected with the trolley and the main beam of the gantry crane is in a safe range.

3. According to the invention, the fixed lifting point of the lifting joist is connected with the upper cross beam by using the shackle and the fixed steel wire rope, so that preliminary fixation of the fixed lifting point and the upper cross beam is realized, effective connection between the lifting joist and the shore bridge structure in the lifting process of the upper structure of the shore bridge can be ensured, and meanwhile, when the lifting joist is stressed, the connection point for fixing the lifting joist can not bear load caused by lifting, and the upper cross beam of the shore bridge is damaged, thereby simultaneously ensuring the reliability and the safety of connection.

4. When the upper structure of the shore bridge is lifted, the lifting process is observed by the unmanned aerial vehicle, so that the height difference between the lifting joist supporting points can be eliminated in time, and the safety is ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.

FIG. 1 is a schematic view of a hoisting joist according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the upper structure of a quay crane and a gantry crane according to an embodiment of the present invention;

FIG. 3 is an enlarged schematic view of the structure shown at A in FIG. 2;

FIG. 4 is an enlarged schematic view of the structure at P in FIG. 2;

FIG. 5 is a schematic diagram of a process for installing a lifting joist by using a lower trolley in an embodiment of the present invention;

FIG. 6 is a top view of an embodiment of the present invention after installation of a lifting joist;

FIG. 7 is a schematic diagram of a roping for hoisting a superstructure of a quay crane in accordance with an embodiment of the present invention;

FIG. 8 is a schematic diagram of a rope disassembly process for hoisting a steel wire rope in an embodiment of the invention;

FIG. 9 is a schematic view of the lifting joist removal in an embodiment of the present invention;

FIG. 10 is a schematic top view of a hoisting wire rope in an embodiment of the invention;

FIG. 11 is a schematic view of a lifting joist disassembled and lifted by a lower trolley in an embodiment of the invention;

fig. 12 is a schematic diagram of a process of lifting a joist removal position in an embodiment of the present invention.

In the figure: the mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustration is only schematic.

Wherein: 1. hoisting joists, 2, a shore bridge upper structure, 3, a support, 4, a gantry crane and 6, a door frame;

11. the guardrail is characterized by comprising a guardrail body, wherein the guardrail body is provided with a fixed hanging point, a lifting hanging point, a middle hanging point, a rib plate and a hanging strip, and the fixed hanging point, the lifting hanging point and the rib plate are respectively provided with a lifting belt;

21. rear pull rod, 22, sea side upper beam, 23, land side upper beam, 24, shackle, 25, fixed wire rope, 26, upper trolley, 27, lower trolley, 28, rear girder, 281, upper beam flange port, 29, diagonal bracing; 51. and (5) balancing the steel wire rope, and hoisting the steel wire rope.

Detailed Description

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Example 1

In an exemplary embodiment of the invention, a method for installing a quay crane superstructure by gantry crane overrun comprises the steps of:

as shown in fig. 2 and 6, the crane 4 is first used to lift the crane superstructure 2, and a plurality of supports 3 are laid on the bottom of the crane superstructure 2 in the longitudinal direction, so as to realize that the crane superstructure 2 is above the ground. The quay crane superstructure 2 comprises an upper cross beam (sea side upper cross beam 22 and land side upper cross beam 23), the top of which is provided with a rear tie rod 21. As shown in fig. 5, a mounting space for the hoisting joist 1 is formed between the rear girder 28 and the upper girder flange 281 of the quay crane superstructure 2. The top of the rear girder of the upper structure 2 of the shore bridge is provided with a diagonal bracing 29, and the structure of the upper structure 2 of the shore bridge is the prior art.

As shown in fig. 1, the gantry crane of the present embodiment realizes hoisting and installation of a quay crane superstructure 2 by hoisting a joist 1. The top of the lifting joist 1 is provided with guardrails 11 along two sides of the length direction for workers to walk, two ends are supporting parts for supporting the bottom surfaces of two end parts of a sea side upper cross beam 22 and a land side upper cross beam 23 of the shore bridge upper structure 2, the lifting joist 1 is provided with at least two lifting hanging points 13 near two ends, one side of each lifting hanging point is provided with a fixed hanging point 12, and two sides of the middle point of the lifting joist 1 are provided with middle hanging points 14 for lifting the lifting joist 1.

As shown in fig. 7, the gantry crane 4 is provided with a lower trolley 27 and an upper trolley 26, and the lower trolley 27 is located below the upper trolley 26 and is movable along an axis between the upper trolleys 26.

The specific installation steps are as follows:

s1: mounting and hoisting joist

As shown in fig. 5, two lifting joists 1 are transferred below the shore bridge superstructure 2 assembly by using a flat car, the lifting of the lifting joists 1 is performed by using two middle lifting points 14 of the lifting joists 1 near the middle, and the lifting joists 1 are lifted between the upper cross beam 22 on the sea side and the upper cross beam flange openings 281 and the rear girder 28 below the upper cross beam 23 on the land side by using the lower trolley 27 of the gantry crane 4 and the hanging strips 16 (2 50 t.30m hanging strips are double).

Since the two ends of the lifting joist 1 need to support the lower parts of the sea side upper cross beam 22 and the land side upper cross beam 23, the length is longer than the distance between the sea side upper cross beam 22 and the land side upper cross beam 23, the lifting space is tense, and the lifting joist 1 needs to be vertically lifted after being obliquely inserted under the sea and land side upper cross beam by the lower trolley 27. By rotating the lifting joist 1 clockwise or anticlockwise by at least 10 ° by means of the lower trolley 27. Because the center distance between the two upper cross beams of the shore bridge upper structure 2 is larger, the smooth alignment can be completed only by ensuring the slowness and the stability in the hoisting process.

In order to prevent the relative sliding between the crane superstructure 2 and the lifting joist 1 caused by inaccurate gravity searching of the crane superstructure 2 in the lifting process, an anti-slip rubber is required to be added between the sea-land side upper cross beam of the crane and the top surfaces of the two ends of the lifting joist 1 for anti-slip.

As shown in fig. 4, the rib plates 15 for positioning the upper beam are welded at the end parts of the lifting joists, and when the lifting joists are abutted against the upper beam, the rib plates 15 are tightly attached to two sides of the upper beam to position, so that sideslip is prevented in the lifting process.

As shown in fig. 2 and 3, the hoisting joist 1 is then connected with the sea side upper beam 22 and the land side upper beam 23 by using the fixing wire rope 25 and the shackle 24, so that the effective connection between the hoisting joist 1 and the shore bridge upper structure 2 in the hoisting process of the shore bridge upper structure 2 can be ensured, and the connection point for fixing the hoisting joist 1 can not bear the load caused by hoisting when the hoisting joist 1 is stressed, and the upper beam of the shore bridge is damaged, thereby simultaneously ensuring the reliability and safety of the connection.

After the lifting joist 1 is installed, the lower trolley 27 of the gantry crane 4 is unhooked, and the hanging strip 16 for installing the lifting joist 1 is paved on the lifting joist 1 for the subsequent disassembly operation of the lifting joist 1.

Through installing two hoist and mount joists 1 between entablature flange mouth 281 and back girder 28 of sea side entablature 22 and land side entablature 23 below for the hoisting point of shore bridge superstructure 2 removes the setting distance to both sides, and then makes the lifting hook on the dolly can not interfere with back pull rod 21, and two lifting hooks of go up dolly 26 are located the back pull rod outside, and lower dolly 27 lifting hook is located in the middle of two back pull rods 21, and the lifting hook of dolly all staggers the position with the back pull rod, makes the hoist and mount go on smoothly.

S2: hoisting of shore bridge

After the hoisting joist 1 is fixed at the bottom of the upper structure 2 of the shore bridge, the upper structure 2 of the shore bridge is hoisted.

In the prior art, since the length of the hoisting steel wire rope 52 is a fixed value, if the hoisting joist 1 is not adopted, the hoisting steel wire rope 52 is matched with the hoisting point on the upper structure 2 of the shore bridge, the hooks on the upper trolley 26 and the lower trolley 27 not only interfere with the rear pull rod 21 and cannot be hoisted, but also the balance steel wire rope 51 connecting the two hooks of the upper trolley 26 is easy to interfere with the main beam of the gantry crane 4 when being hoisted to a high point, the landing of the upper structure of the shore bridge on the door frame 6 cannot be realized, and the cost is increased by replacing the hoisting steel wire rope 52.

As shown in fig. 7, the gantry crane is first used for rope matching, and two trolleys (an upper trolley 26 and a lower trolley 27) are used for hoisting, and the two hooks of the upper trolley 26 are balanced by a balancing wire rope 51. The four hoisting steel wire ropes 52 are doubled, wherein two hoisting points 13 are respectively arranged beside the fixed hoisting points 12 at the two ends of the hoisting joist 1, two rope ends of each hoisting steel wire rope 52 are connected with the hoisting points 13 through shackles, and the hoisting steel wire ropes 52 bypass two lifting hooks on the upper trolley 26 and bypass one lifting hook 27 on the lower trolley 27. And finally, two hoisting steel wires 52 are wound around two lifting hooks of the upper trolley 26 on one side, and two lifting hooks 27 on the lower trolley 27 on the other side, so that a rope distribution schematic shown in fig. 7 is formed.

The outward movement of the lifting point is realized by using the lifting joist 1, and the lifting hook of the trolley is staggered with the rear pull rod 21 and cannot interfere with the rear pull rod 21; simultaneously, the lifting joist 1 realizes that a lifting point moves downwards, a lifting hook can be lowered, and then the position of the balance steel wire rope 51 can move downwards, and when the shore bridge superstructure 2 falls on a door frame, the balance steel wire rope 51 and a main beam of the gantry crane 4 cannot interfere.

And then three groups of lifting hooks of the gantry crane 4 are lifted simultaneously, the lifting joist 1 is stressed, the upper structure 2 of the shore bridge is supported to be lifted, and in the lifting process, an unmanned aerial vehicle is required to be used for observing whether deformation exists at the connection position between the lifting joist 1 and the upper structure 2 of the shore bridge.

The three groups of lifting hooks (one lower trolley lifting hook and two lifting hooks of the upper trolley) of the gantry crane 4 continue to lift simultaneously, whether four supporting points of the sea-land side upper beam of the upper structure 2 of the shore bridge are smoothly separated from a jig frame (a supporting 3) or not is observed, whether a height difference exists between the four supporting points (supporting points at two ends of the lifting joist 1) or not is observed, if the height difference exists, the pitching angle of the front girder is adjusted through a pitching mechanism of the upper structure 2 of the shore bridge, and then the gravity center of the upper structure 2 of the whole shore bridge is adjusted, so that the four supporting points at the bottom of the sea-land side upper beam of the upper structure 2 of the shore bridge tend to be horizontal.

Three groups of lifting hooks of the gantry crane 4 are lifted to a preset height, and the distance between the rear pull rod 21 of the quay bridge and the web plate of the main beam of the gantry crane is monitored in real time by using an unmanned aerial vehicle in the process, so that collision is avoided.

And after the hoisting safety is confirmed, the gantry crane 4 slowly moves, and the quay crane superstructure 2 is hoisted to a position on the door frame 6.

S3: lifting joist dismantling

As shown in fig. 9, after the welding between the bridge superstructure 2 and the door frame 6 meets the requirements, the three sets of hooks of the upper trolley 26 and the lower trolley 27 start to unhook and remove the lifting joist 1.

As shown in fig. 8, firstly, 3 groups of hooks of a gantry crane are lowered to the position of the lifting joist 1, after the shackle 24 between the lifting wire rope 52 and the lifting point 13 of the lifting joist 1 is loosened, the rope heads of the lifting wire rope 52 are respectively connected with the hooks corresponding to each lifting wire rope 52 by using a lifting belt, so that the rope heads of the lifting wire rope 52 are prevented from being suspended at the bottom.

The gantry crane has 3 lifting hooks for lifting, so that the rope heads of the sea side lifting steel wire ropes 52 can cross the diagonal bracing 29 at the top of the rear girder, and the rope heads of the lifting steel wire ropes 52 are respectively connected with the lifting hooks corresponding to each lifting steel wire rope 52 by using lifting belts, so that the rope heads can not interfere with the diagonal bracing 29 in the lifting process of the lifting hooks.

As shown in fig. 10, the two upper and lower trolleys of the gantry crane 4 are moved, so that the hooks on the trolleys are moved to the outer side of the landing bridge door frame 6, and then 3 hooks are lowered, and 4 hoisting steel wire ropes 52 are lowered to the ground to unhook.

As shown in fig. 11, the lower trolley 27 lifting hook (single hook) of the gantry crane 4 is lifted to the upper side of the lifting joist 1, the hanging strip 16 reserved on the lifting joist 1 is used for connecting the two middle lifting points 14 of the lifting joist with the lifting hook, the lifting hook is provided with force, so that the connecting shackle between the lifting joist 1 and the upper cross beam is in a loose state, the connecting shackle 24 between the fixed lifting point 12 of the lifting joist 1 and the upper cross beam of the shore bridge upper structure is conveniently released, and the lifting joist 1 is disconnected from the upper cross beam at this time, and the lifting joist 1 is only connected by the lower trolley 27 through the hanging strip.

As shown in fig. 12, the lower trolley 27 lowers the lifting joist below the shore bridge connecting beam through the hanging strip 16, when the lower cross beam is at a position above, the lifting joist 1 is moved 2m towards the land side lower cross beam, so that the end part of the lifting joist 1 is staggered with the sea side lower cross beam, the lifting joist is rotated by 90 degrees by using the lead rope, then the lifting joist is continuously lowered onto the flat car to be carried away, the other lifting joist 1 is removed by repeating the steps, and at the moment, the lifting of the shore bridge superstructure 2 and the removal of the lifting joist 1 are completed.

According to the embodiment, the lifting capacity of the gantry crane can be further improved on the premise that the existing use height of the gantry crane lifting hook is limited and interference exists between the gantry crane lifting hook and a lifting object, interference is avoided, and lifting is completed.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The method for installing the upper structure of the quay crane by the overrunning of the gantry crane is characterized by comprising the following steps of:

the gantry crane is matched with the hanging strip to hoist the two hoisting joists between the rear girder below the upper cross beam and the flange opening of the upper cross beam to realize outward movement of a hoisting point, the hoisting point is staggered with the rear pull rod, and the hoisting joists are fixedly connected with the upper cross beam;

the gantry crane is connected with a hoisting joist through three groups of lifting hooks consisting of two lifting hooks of the upper trolley and one lifting hook of the lower trolley in a matched hoisting steel wire rope, and the upper structure of the hoisting shore bridge is welded to the landing position of the door frame;

the three groups of lifting hooks are placed down and the hoisting steel wire ropes are removed, the lower trolley is connected with the hoisting joists through the hanging strips, the connection between the hoisting joists and the upper cross beam is firstly removed, and then the hoisting joists are placed down to the flat trolley to be transported away, so that the removal of the two hoisting joists is sequentially completed.

2. The method for installing the upper structure of the quay bridge by the portal crane in an overrun mode according to claim 1, wherein two middle hanging points are symmetrically arranged on the hoisting joist near the middle, lifting hanging points and fixed hanging points are arranged at the two ends, a lifting hook of a lower trolley of the portal crane is connected with the middle hanging points through hanging straps to install the hoisting joist, after the two ends of the hoisting joist are in butt joint with the bottoms of an upper cross beam on the sea side and an upper cross beam on the land side, the fixed hanging points and the upper cross beam are connected through shackles and fixed steel wires, then the lower trolley is unhooked, and hanging straps are paved on the hoisting joist.

3. The method for installing the upper structure of the quay bridge by the portal crane in an overrun manner according to claim 2, wherein the lower trolley is connected with the lifting joists through hanging straps, and the lifting joists are obliquely inserted below the sea side upper cross beam and the land side upper cross beam and then vertically lifted.

4. The method for installing the upper structure of the quay bridge in the overrun manner of the gantry crane according to claim 2, wherein two ends of the lifting joist are respectively abutted against the sea side upper cross beam and the land side upper cross beam, the lifting joist is provided with an anti-slip rubber for anti-slip, and two sides of the matching part of the lifting joist and the upper cross beam are provided with rib plates closely attached to the upper cross beam for positioning.

5. The method for installing the upper structure of the quay crane in an overrun manner according to claim 2, wherein when the upper structure of the quay crane is lifted, two rope heads of the hoisting steel wire ropes are utilized to be matched with shackles to be connected with hoisting hanging points, the middle part of the hoisting steel wire ropes is matched with three groups of lifting hooks, the lower trolley is connected with two ends of one hoisting joist through two hoisting steel wire ropes, the two lifting hooks of the upper trolley are connected with two ends of the other hoisting joist through two steel wire ropes, and the two lifting hooks of the upper trolley are connected through balance steel wire ropes.

6. The method for installing the upper structure of the quay crane in an overrun manner according to claim 5, wherein when the hoisting joist is installed, the upper structure of the quay crane is lifted by using a support, when the upper structure of the quay crane is lifted, whether a height difference exists at a supporting point between the hoisting joist and an upper cross beam is observed by using an unmanned plane, if the height difference exists, a pitching mechanism for adjusting the upper structure of the quay crane is eliminated, and whether a rear pull rod and a balance wire rope interfere with a girder of the quay crane is observed in the hoisting process.

7. The method for installing the upper structure of the quay crane in an overrun manner by using the gantry crane according to claim 2, wherein three groups of hooks are lowered to the lifting joist, the lifting wire rope is unwound, two rope ends of the lifting wire rope are connected with the three groups of hooks through hanging strips, the three groups of hooks are lifted, the rope ends of the sea side lifting wire rope smoothly cross the diagonal bracing at the top of the rear girder, the upper trolley and the lower trolley are moved to the outer side of the door frame, the hooks are lowered to the ground, and unhooking is performed.

8. The method for installing the upper structure of the quay crane in an overrun manner by using the gantry crane according to claim 7, wherein the lower trolley of the gantry crane is lifted above the lifting joist, the lower trolley lifting hook is connected with the middle lifting point of one lifting joist through the reserved hanging strip, the lower trolley lifting hook is provided with a force to enable the connecting shackle between the lifting joist and the upper cross beam to be in a loose state, and the fixed connection between the fixed lifting point and the upper cross beam is released.

9. A method of installing a quay crane superstructure over-limit according to claim 8, wherein the lower trolley hook lowers the lifting joist to a position below the quay bridge landing beam by means of a sling, and the lifting joist is rotated by 90 ° by means of a lead wire and then lowered to the flatbed for transport.

10. A method of installing a quay crane superstructure over-limit according to claim 9, wherein the lower trolley removes the second lifting joist in the same manner.